GB2401743A - Computer generated holograms - Google Patents

Computer generated holograms Download PDF

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Publication number
GB2401743A
GB2401743A GB0417826A GB0417826A GB2401743A GB 2401743 A GB2401743 A GB 2401743A GB 0417826 A GB0417826 A GB 0417826A GB 0417826 A GB0417826 A GB 0417826A GB 2401743 A GB2401743 A GB 2401743A
Authority
GB
United Kingdom
Prior art keywords
computer generated
generated hologram
binary
real positive
generated holograms
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0417826A
Other versions
GB0417826D0 (en
GB2401743B (en
Inventor
Robert Ian Young
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Holographic Imaging LLC
Original Assignee
Holographic Imaging LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Holographic Imaging LLC filed Critical Holographic Imaging LLC
Publication of GB0417826D0 publication Critical patent/GB0417826D0/en
Publication of GB2401743A publication Critical patent/GB2401743A/en
Application granted granted Critical
Publication of GB2401743B publication Critical patent/GB2401743B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/08—Synthesising holograms, i.e. holograms synthesized from objects or objects from holograms
    • G03H1/0841—Encoding method mapping the synthesized field into a restricted set of values representative of the modulator parameters, e.g. detour phase coding
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2294—Addressing the hologram to an active spatial light modulator
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2240/00—Hologram nature or properties
    • G03H2240/20—Details of physical variations exhibited in the hologram
    • G03H2240/40—Dynamic of the variations
    • G03H2240/41—Binary

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Holo Graphy (AREA)
  • Processing Or Creating Images (AREA)

Abstract

A method of generating a binary computer generated hologram for use in displaying a holographic image, the method comprising the steps of generating a complex modulation computer generated hologram corresponding to a desired replay object, transforming the complex modulation computer generated hologram into a real positive computer generated hologram, and transforming the real positive computer generated hologram into a binary computer generated hologram by comparing each element of the real positive computer generated hologram with at least one neighboring element and replacing the compared element with a binary value which depends upon the result of the comparison.

Description

GB 2401743 A continuation
(72) Inventor(s): (58) Field of Search by ISA:
Robert lan Young INT CL7 GOSH Other: INSPEC, EPO Internal (74) Agent and/or Address for Service: Qinetiq IP Cody Technology Park, A4 Building Room GO16, Ively Road, FARNBOROUGH, Hants, GU14 OLX, United Kingdom
GB0417826A 2002-02-23 2003-02-18 Computer generated holograms Expired - Fee Related GB2401743B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0204314.9A GB0204314D0 (en) 2002-02-23 2002-02-23 Computer generated holograms
PCT/GB2003/000762 WO2003071360A1 (en) 2002-02-23 2003-02-18 Computer generated holograms

Publications (3)

Publication Number Publication Date
GB0417826D0 GB0417826D0 (en) 2004-09-15
GB2401743A true GB2401743A (en) 2004-11-17
GB2401743B GB2401743B (en) 2005-10-05

Family

ID=9931669

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB0204314.9A Ceased GB0204314D0 (en) 2002-02-23 2002-02-23 Computer generated holograms
GB0417826A Expired - Fee Related GB2401743B (en) 2002-02-23 2003-02-18 Computer generated holograms

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB0204314.9A Ceased GB0204314D0 (en) 2002-02-23 2002-02-23 Computer generated holograms

Country Status (4)

Country Link
US (1) US7161721B2 (en)
AU (1) AU2003208438A1 (en)
GB (2) GB0204314D0 (en)
WO (1) WO2003071360A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2379850A (en) * 2001-09-14 2003-03-19 Holographic Imaging Llc Computation of computer generated holograms
US7633631B2 (en) * 2007-04-04 2009-12-15 Nikon Corporation Three-dimensional microscope and method for obtaining three-dimensional image
US10041343B2 (en) 2009-06-02 2018-08-07 Halliburton Energy Services, Inc. Micro-sonic density imaging while drilling systems and methods
WO2011038170A2 (en) 2009-09-26 2011-03-31 Halliburton Energy Services, Inc. Downhole optical imaging tools and methods
KR101890401B1 (en) 2016-12-28 2018-08-21 한국과학기술연구원 Apparatus, method and computer program for generating binary holograms for scenes with large depth
KR102577707B1 (en) * 2018-04-30 2023-09-14 한국전자통신연구원 Apparatus and method for evaluating hologram encoding / holographic image quality for amplitude-modulated hologram
KR102251744B1 (en) 2019-07-29 2021-05-13 한국과학기술연구원 Apparatus and method for generating binary holograms based on parallel computing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69836360T2 (en) * 1997-05-22 2007-08-23 Nippon Telegraph And Telephone Corp. System for displaying computer-controlled holographic images
US6275310B1 (en) 2000-05-22 2001-08-14 The United States Of America As Represented By The Secretary Of The Air Force Modified minimum distance criterion for blended random and nonrandom encoding

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
FERRI L C: "Visualisation of 3D information with digital holography yusing laser printers". Computer and Graphics, Pergamon Press, vol 25, no 2, April 2001. pp 309 - 321 *
HAUCK R et al: "Computer-generated holograms with pulse-density modulation". Journal of Optical Soc. of America, A (Optics and Science), JAn 1984, vol1, no 1, pp 5 - 10 & Figures 1, 2, 8, 9 *
LEGEARD L, AMBS P: "Etude comparaive des differents methodes de codage binaire pur hologrammes synthesises par ordinateur" ESI Proc - OPTO 92, Apr 1992, pp 149 - 158 *

Also Published As

Publication number Publication date
WO2003071360A8 (en) 2004-10-07
US20050088712A1 (en) 2005-04-28
GB0417826D0 (en) 2004-09-15
GB2401743B (en) 2005-10-05
US7161721B2 (en) 2007-01-09
GB0204314D0 (en) 2002-04-10
WO2003071360A1 (en) 2003-08-28
AU2003208438A1 (en) 2003-09-09

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20200218